ixgbe: Drop probe_vf and merge functionality into ixgbe_enable_sriov
This is meant to fix a bug in which we were not checking for pre-existing
VFs if we were not setting the max_vfs value at driver load. What happens
now is that we always call ixgbe_enable_sriov and this checks for
pre-existing VFs ore requested VFs prior to deciding on no SR-IOV.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index a825d48..593fdd5 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -82,7 +82,6 @@
const struct ixgbe_info *ii)
{
struct ixgbe_hw *hw = &adapter->hw;
- int err = 0;
int num_vf_macvlans, i;
struct vf_macvlans *mv_list;
int pre_existing_vfs = 0;
@@ -106,10 +105,21 @@
"enabled for this device - Please reload all "
"VF drivers to avoid spoofed packet errors\n");
} else {
+ int err;
+ /*
+ * The 82599 supports up to 64 VFs per physical function
+ * but this implementation limits allocation to 63 so that
+ * basic networking resources are still available to the
+ * physical function. If the user requests greater thn
+ * 63 VFs then it is an error - reset to default of zero.
+ */
+ adapter->num_vfs = min_t(unsigned int, adapter->num_vfs, 63);
+
err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
if (err) {
e_err(probe, "Failed to enable PCI sriov: %d\n", err);
- goto err_novfs;
+ adapter->num_vfs = 0;
+ return;
}
}
@@ -193,11 +203,7 @@
/* Oh oh */
e_err(probe, "Unable to allocate memory for VF Data Storage - "
"SRIOV disabled\n");
- pci_disable_sriov(adapter->pdev);
-
-err_novfs:
- adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
- adapter->num_vfs = 0;
+ ixgbe_disable_sriov(adapter);
}
#endif /* #ifdef CONFIG_PCI_IOV */
@@ -219,6 +225,10 @@
kfree(adapter->mv_list);
adapter->mv_list = NULL;
+ /* if SR-IOV is already disabled then there is nothing to do */
+ if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
+ return;
+
#ifdef CONFIG_PCI_IOV
/* disable iov and allow time for transactions to clear */
pci_disable_sriov(adapter->pdev);